Power management server, power management method, and power management system

Abstract

A power management apparatus includes a receiver configured to receive measurement information obtained by measuring a power of a facility connected to a power grid; and a transmitter configured to transmit a power control message. The transmitter transmits the power control message based on an output power amount of a distributed power supply provided in the facility, in addition to the measurement information. The measurement information is information indicating a total power flow amount from the power grid to the facility or a total reverse power flow amount from the facility to the power grid. The distributed power supply is a power supply that allows a reverse power flow from the facility to the power grid.

The invention claimed is: 
     
       1. A power management server, comprising:
 a receiver configured to receive measurement information obtained by measuring, at a smart meter, a power of at least one facility connected to a power grid; 
 a transmitter configured to transmit a power control message based on an output power amount of a distributed power supply provided in the at least one facility, and based on the measurement information; and 
 a processor, wherein 
 the output power amount of the distributed power supply is measured by a sensor different from the smart meter, 
 the measurement information indicates a total power flow amount from the power grid to the facility, or indicates a total reverse power flow amount from the facility to the power grid, 
 the distributed power supply allows a reverse power flow from the facility to the power grid, 
 the at least one facility comprises a plurality of facilities, 
 the power control message includes a power flow control message from the power grid to one of the plurality of facilities, 
 the processor is configured to calculate
 a first value by subtracting the total reverse power flow amount from the output power amount, and 
 a second value by adding the total power flow amount to the output power amount, and 
 
 the transmitter is configured to transmit the power flow control message to a facility among the plurality of facilities in which the first value larger than such value in another facility among the plurality of facilities or the second value is larger than such value in another facility among the plurality of facilities. 
 
     
     
       2. The power management server according to  claim 1 , wherein
 the transmitter is configured to transmit the power flow control message to the facility when a reverse power flow amount from the facility to the power grid is not controlled. 
 
     
     
       3. The power management server according to  claim 1 , wherein
 an entity providing a power to the facility is different from an entity purchasing a power from the facility, 
 the power management server is controlled by the entity purchasing the power from the facility, and 
 the transmitter is configured to transmit the power flow control message to the facility providing the distributed power supply when the output power amount is equal to or greater than a predetermined threshold value. 
 
     
     
       4. A power management server, comprising:
 a receiver configured to receive measurement information obtained by measuring a power of at least one facility connected to a power grid; 
 a transmitter configured to transmit a power control message based on an output power amount of a distributed power supply provided in the at least one facility, and based on the measurement information; and 
 a controller, wherein 
 the measurement information indicates a total power flow amount from the power grid to the facility or indicates a total reverse power flow amount from the facility to the power grid, 
 the distributed power supply allows a reverse power flow from the facility to the power grid, 
 the power control message includes a power flow control message from the power grid to the facility, 
 an entity providing a power to the facility is different from an entity purchasing a power from the facility, 
 the power management server is controlled by the entity purchasing the power from the facility, 
 the transmitter is configured to transmit the power flow control message to the facility providing the distributed power supply when the output power amount is equal to or greater than a predetermined threshold value, 
 the controller is configured to estimate, based on the measurement information and the output power amount, a power consumption amount consumed in the facility and a power reduction amount capable of being reduced in the facility, and 
 the predetermined threshold value is a value obtained by subtracting the power reduction amount from the power consumption amount. 
 
     
     
       5. A power management method, comprising:
 receiving measurement information obtained by measuring, at a smart meter, a power of at least one facility connected to a power grid; and 
 transmitting a power control message based on an output power amount of a distributed power supply, and based on the measurement information, 
 wherein 
 the output power amount of the distributed power supply is measured by a sensor different from the smart meter, 
 the measurement information indicates a total power flow amount from the power grid to the facility, or indicates a total reverse power flow amount from the facility to the power grid, 
 the distributed power supply allows a reverse power flow from the facility to the power grid, 
 the at least one facility comprises a plurality of facilities, 
 the power control message includes a power flow control message from the power grid to one of the plurality of facilities, and 
 the method further comprises
 calculating a first value by subtracting the total reverse power flow amount from the output power amount; 
 calculating a second value by adding the total power flow amount to the output power amount; and 
 
 transmitting the power flow control message to a facility among the plurality of facilities in which the first value larger than such value in another facility among the plurality of facilities or the second value is larger than such value in another facility among the plurality of facilities. 
 
     
     
       6. A power management system, comprising:
 a receiver configured to receive measurement information obtained by measuring, at a smart meter, a power of at least one facility connected to a power grid; 
 a transmitter configured to transmit a power control message based on an output power amount of a distributed power supply, and based on the measurement information; and 
 a processor, 
 
       wherein
 the output power amount of the distributed power supply is measured by a sensor different from the smart meter, 
 the measurement information indicates a total power flow amount from the power grid to the facility, or indicates or a total reverse power flow amount from the facility to the power grid, 
 the distributed power supply allows a reverse power flow from the facility to the power grid, 
 the at least one facility comprises a plurality of facilities, 
 the power control message includes a power flow control message from the power grid to one of the plurality of facilities, and 
 the processor is configured to calculate
 a first value by subtracting the total reverse power flow amount from the output power amount, and 
 a second value by adding the total power flow amount to the output power amount, and 
 
 the transmitter is configured to transmit the power flow control message to a facility among the plurality of facilities in which the first value larger than such value in another facility among the plurality of facilities or the second value is larger than such value in another facility among the plurality of facilities.